Colorectal cancer other imaging findings: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
__NOTOC__ | __NOTOC__ | ||
{{Colon cancer}} | {{Colon cancer}} | ||
To view the other imaging findings of familial adenomatous polyposis (FAP), click [[Familial adenomatous polyposis other imaging findings|'''here''']]<br> | |||
To view the other imaging findings of hereditary nonpolyposis colorectal cancer (HNPCC), click [[Hereditary nonpolyposis colorectal cancer other imaging findings|'''here''']]<br><br> | |||
{{CMG}} {{AE}} Saarah T. Alkhairy, M.D. | |||
==Overview== | |||
Other imaging tests that can be used for colorectal cancer are endoscopy, PET scan, barium study, and angiography. | |||
==Other Imaging Findings== | ==Other Imaging Findings== | ||
====Endoscopy==== | |||
*A [[sigmoidoscopy]] is a lighted probe (sigmoidoscope) that is inserted into the rectum and lower colon to check for polyps and other abnormalities | |||
*A [[colonoscopy]] is a lighted probe (colonoscope) that is inserted into the rectum and the entire colon to look for [[polyp (medicine)|polyp]]s and other abnormalities that may be caused by cancer. A colonoscopy has the advantage that if [[polyp (medicine)|polyp]]s are found during the procedure they can be immediately removed, and the tissue can also be taken for [[biopsy]]. The [http://www.asge.org/ American Society for Gastrointestinal Endoscopy] has released quality indicators for screening colonoscopy, which include:<ref name="pmid16635231">{{cite journal| author=Rex DK, Petrini JL, Baron TH, Chak A, Cohen J, Deal SE et al.| title=Quality indicators for colonoscopy. | journal=Am J Gastroenterol | year= 2006 | volume= 101 | issue= 4 | pages= 873-85 | pmid=16635231 | doi=10.1111/j.1572-0241.2006.00673.x | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16635231 }} </ref> | |||
:*Documentation of prep quality | |||
:*Photo documentation of cecal intubation | |||
:*Withdrawal time of 6 minutes or more | |||
:*Adenoma detection rate of greater than 25% in males and 15% in females greater than 50 years old. | |||
===PET scan=== | ===PET scan=== | ||
Cancer cells in the body grow rapidly, so they absorb the radioactive sugar fluorodeoxyglucose or FDG used in [[ | Cancer cells in the body grow rapidly, so they absorb the radioactive sugar fluorodeoxyglucose or FDG used in [[positron emission tomography]] (PET). The location and extent of the tumor mass can be determined using a [[PET]] scan. Also, metastatic lesions and their locations can be assessed using a PET scan. | ||
PET scans are evolving as a very useful modality for staging and assessment of colorectal cancers. PET-CT scan has the advantage tissue based resolution and is useful in detecting whole body metastasis. | PET scans are evolving as a very useful modality for staging and assessment of colorectal cancers. PET-CT scan has the advantage tissue based resolution and is useful in detecting whole body metastasis. | ||
| Line 13: | Line 25: | ||
===Barium Study=== | ===Barium Study=== | ||
Barium study can be used to delineate the lesion preoperatively. | Barium study can be used to delineate the lesion preoperatively. | ||
===Angiography=== | |||
Angiography can be useful in showing the arteries that supply blood to those tumors, which helps surgeons plan the surgical procedure. | |||
Angiography may also be done with a CT scanner (CT angiography) or an MRI scanner (MR angiography). These techniques give information about the blood vessels in the liver without the need for a catheter. | |||
==References== | ==References== | ||
Revision as of 13:30, 15 July 2015
|
Colorectal cancer Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Colorectal cancer other imaging findings On the Web |
|
American Roentgen Ray Society Images of Colorectal cancer other imaging findings |
|
Risk calculators and risk factors for Colorectal cancer other imaging findings |
To view the other imaging findings of familial adenomatous polyposis (FAP), click here
To view the other imaging findings of hereditary nonpolyposis colorectal cancer (HNPCC), click here
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Saarah T. Alkhairy, M.D.
Overview
Other imaging tests that can be used for colorectal cancer are endoscopy, PET scan, barium study, and angiography.
Other Imaging Findings
Endoscopy
- A sigmoidoscopy is a lighted probe (sigmoidoscope) that is inserted into the rectum and lower colon to check for polyps and other abnormalities
- A colonoscopy is a lighted probe (colonoscope) that is inserted into the rectum and the entire colon to look for polyps and other abnormalities that may be caused by cancer. A colonoscopy has the advantage that if polyps are found during the procedure they can be immediately removed, and the tissue can also be taken for biopsy. The American Society for Gastrointestinal Endoscopy has released quality indicators for screening colonoscopy, which include:[1]
- Documentation of prep quality
- Photo documentation of cecal intubation
- Withdrawal time of 6 minutes or more
- Adenoma detection rate of greater than 25% in males and 15% in females greater than 50 years old.
PET scan
Cancer cells in the body grow rapidly, so they absorb the radioactive sugar fluorodeoxyglucose or FDG used in positron emission tomography (PET). The location and extent of the tumor mass can be determined using a PET scan. Also, metastatic lesions and their locations can be assessed using a PET scan.
PET scans are evolving as a very useful modality for staging and assessment of colorectal cancers. PET-CT scan has the advantage tissue based resolution and is useful in detecting whole body metastasis.
Barium Study
Barium study can be used to delineate the lesion preoperatively.
Angiography
Angiography can be useful in showing the arteries that supply blood to those tumors, which helps surgeons plan the surgical procedure.
Angiography may also be done with a CT scanner (CT angiography) or an MRI scanner (MR angiography). These techniques give information about the blood vessels in the liver without the need for a catheter.
References
- ↑ Rex DK, Petrini JL, Baron TH, Chak A, Cohen J, Deal SE; et al. (2006). "Quality indicators for colonoscopy". Am J Gastroenterol. 101 (4): 873–85. doi:10.1111/j.1572-0241.2006.00673.x. PMID 16635231.